i have 2 .bun/.cwb files (i forget which) that are corrupt from 2007. i get told on forums to try opening them in Safe Mode, but when i do that, the project opens up; there's just nothing in it. i have mentioned several times before that i wish there were a utility program that could open up corrupt .bun/.cwb files minus the stuff that is corrupting them. like if a track had audiosnap in it, and that was what was corrupting the .bun/.cwb then it would open up the .bun/.cwb file WITHOUT audiosnap.
i generally learn important things the hard way, and this was one of them. i NEVER use .bun/.cwb files!